Four new triterpene saponins were isolated from the methanol extract of the aerial parts of Alternanthera repens. Their structures have been elucidated using a combination of 1D and 2D NMR techniques as 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-beta-D-glucopyranosyl-(1 --> 2)-O-alpha-L-arabinopyranosyl-(1 --> 2)-O-[beta-D-xylopyranosyl-(1 --> 3)]beta-D-glucopyranoside}; 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-beta-D-quinovopyranosyl-(1 --> 2)-O-alpha-L-arabinopyranosyl-(1 --> 2)-O-[beta-D-xylopyranosyl-(1 --> 3)]beta-D-glucopyranoside}; 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-alpha-L-arabinopyranosyl-(1 --> 2)-O-[beta-D-xylopyranosyl-(1 --> 3)]beta-D-glucopyranoside}; 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-beta-D-xylopyranosyl-(1 --> 3)-beta-D-glucopyranoside}.(C)

Triterpene saponins from Alternanthera repens

PIZZA, Cosimo;DE TOMMASI, Nunziatina
1999-01-01

Abstract

Four new triterpene saponins were isolated from the methanol extract of the aerial parts of Alternanthera repens. Their structures have been elucidated using a combination of 1D and 2D NMR techniques as 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-beta-D-glucopyranosyl-(1 --> 2)-O-alpha-L-arabinopyranosyl-(1 --> 2)-O-[beta-D-xylopyranosyl-(1 --> 3)]beta-D-glucopyranoside}; 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-beta-D-quinovopyranosyl-(1 --> 2)-O-alpha-L-arabinopyranosyl-(1 --> 2)-O-[beta-D-xylopyranosyl-(1 --> 3)]beta-D-glucopyranoside}; 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-alpha-L-arabinopyranosyl-(1 --> 2)-O-[beta-D-xylopyranosyl-(1 --> 3)]beta-D-glucopyranoside}; 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-beta-D-xylopyranosyl-(1 --> 3)-beta-D-glucopyranoside}.(C)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/3207077
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